51
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Affiliation(s)
- Wen Zhou
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, and Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Xia Gao
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, and Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Dingbin Liu
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, and Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
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52
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Xi D, Wang X, Ai S, Zhang S. Detection of cancer cells using triplex DNA molecular beacons based on expression of enhanced green fluorescent protein (eGFP). Chem Commun (Camb) 2015; 50:9547-9. [PMID: 25012879 DOI: 10.1039/c4cc03925d] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel strategy was proposed for Ramos cell detection by combining the expression of enhanced green fluorescent protein (eGFP) with the cell aptamer recognition and the triplex molecular beacons. This system was successfully applied to cancer cell detection with high sensitivity and specificity.
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Affiliation(s)
- Dongmei Xi
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, College of Chemistry and Chemical Engineering, Linyi University, Linyi 276005, P. R. China.
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53
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Zhang X, Cheng R, Shi Z, Jin Y. A PCR-free fluorescence strategy for detecting telomerase activity via double amplification strategy. Biosens Bioelectron 2015; 75:101-7. [PMID: 26299822 DOI: 10.1016/j.bios.2015.08.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/04/2015] [Accepted: 08/08/2015] [Indexed: 01/23/2023]
Abstract
As a universal tumor biomarker, research on the activity and inhibition of telomerase is of great importance for cancer diagnosis and therapy. Although the telomeric repeat amplification protocol (TRAP) has served as a powerful assay for detecting telomerase activity, its application has been significantly limited by amplification related errors and time-consuming procedure. To address the limitations of PCR-based protocol, a dual amplification fluorescence assay was developed for PCR-free detecting telomerase activity. Briefly, we designed an arch-structure DNA probe to specifically control strand displacement reaction and subsequent enzyme-aided amplification. Telomerase substrate (TS) primer was extended by telomerase to form long elongation products which contain several TTAGGG repeat units. So, one elongation product can release more than one trigger DNA (t-DNA) via strand displacement reaction to realize first amplification. Subsequently, t-DNA specifically opened molecular beacon (MB) to restore the fluorescence of MB. Meanwhile, t-DNA was recycled by the aid of nicking endonuclease to continuously open more and more MBs, leading to a second amplification. Owing to the double amplification strategy, the proposed method allowed the measurement of telomerase activity in crude cell extracts equivalent to 5 HeLa cells and 10 CCRF-CEM cells without PCR amplification. Besides, the influence of telomere-binding ligands on the telomerase activity demonstrated that the proposed method holds the potential to evaluate the inhibition efficiency of telomerase inhibitors.
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Affiliation(s)
- Xiafei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Rui Cheng
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Zhilu Shi
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
| | - Yan Jin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
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54
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Zhao M, Liao N, Zhuo Y, Chai YQ, Wang JP, Yuan R. Triple Quenching of a Novel Self-Enhanced Ru(II) Complex by Hemin/G-Quadruplex DNAzymes and Its Potential Application to Quantitative Protein Detection. Anal Chem 2015; 87:7602-9. [DOI: 10.1021/acs.analchem.5b01671] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Min Zhao
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ni Liao
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
- College
of Biological and Chemical Engineering, Panzhihua University, Panzhihua 617000, China
| | - Ying Zhuo
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ya-Qin Chai
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ji-Peng Wang
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ruo Yuan
- Key
Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest
University), Ministry of Education, College of Chemistry and Chemical
Engineering, Southwest University, Chongqing 400715, China
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55
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Zhang B, Chen J, Liu B, Tang D. Amplified electrochemical sensing of lead ion based on DNA-mediated self-assembly-catalyzed polymerization. Biosens Bioelectron 2015; 69:230-4. [DOI: 10.1016/j.bios.2015.02.041] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 02/24/2015] [Accepted: 02/27/2015] [Indexed: 01/08/2023]
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56
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Golub E, Lu CH, Willner I. Metalloporphyrin/G-quadruplexes: From basic properties to practical applications. J PORPHYR PHTHALOCYA 2015. [DOI: 10.1142/s1088424615300025] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Guanine-rich single-stranded nucleic acids self-assemble into G-quadruplex nanostructures (predominately in the presence of K +-ions). Metalloporphyrins bind to the G-quadruplex nanostructures to form supramolecular assemblies exhibiting unique catalytic, electrocatalytic and photophysical properties. This paper addresses the advances in the characterization and the implementation of the metalloporphyrin/G-quadruplexes complexes for various applications. Out of the different complexes, the most extensively studied complexes are the hemin/G-quadruplex horseradish peroxidase-mimicking DNAzyme and the Zn(II) -protoporphyrin IX-functionalized G-quadruplex. Specifically, the hemin/G-quadruplex was found to act as a catalyst for driving different chemical transformations that mimic the native horseradish peroxidase enzyme, and, also, to function as an electrocatalyst for the reduction of H 2 O 2. Also, the hemin/G-quadruplex stimulates interesting photophysical and photocatalytic processes such as the electron-transfer quenching of semiconductor quantum dots or the chemiluminescence resonance energy transfer to semiconductor quantum dots. Alternatively, Zn(II) -protoporphyrin IX associated with G-quadruplexes exhibit intensified fluorescence properties. Beyond the straight forward application of the metalloporphyrin/G-quadruplexes as catalysts that stimulate different chemical transformations, the specific catalytic, electrocatalytic and photocatalytic functions of hemin/G-quadruplexes are heavily implemented to develop sophisticated colorimetric, electrochemical, and optical sensing platforms. Also, the unique fluorescence properties of Zn(II) -protoporphyrin IX-functionalized G-quadruplexes are applied to develop fluorescence sensing platforms. The article exemplifies different sensing assays for analyzing DNA, ligand-aptamer complexes and telomerase activity using the metalloporphyrins/G-quadruplexes as transducing labels. Also, the use of the hemin/G-quadruplex as a probe to follow the operations of DNA machines is discussed.
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Affiliation(s)
- Eyal Golub
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel
| | - Chun-Hua Lu
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel
| | - Itamar Willner
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel
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57
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Liu X, Li W, Hou T, Dong S, Yu G, Li F. Homogeneous Electrochemical Strategy for Human Telomerase Activity Assay at Single-Cell Level Based on T7 Exonuclease-Aided Target Recycling Amplification. Anal Chem 2015; 87:4030-6. [DOI: 10.1021/acs.analchem.5b00355] [Citation(s) in RCA: 147] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xiaojuan Liu
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, People’s Republic of China
| | - Wei Li
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, People’s Republic of China
| | - Ting Hou
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, People’s Republic of China
| | - Shanshan Dong
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, People’s Republic of China
| | - Guanghui Yu
- College
of Animal Science and Technology, Qingdao Agricultural University, Qingdao, Shandong 266109, People’s Republic of China
| | - Feng Li
- College
of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, Shandong 266109, People’s Republic of China
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58
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Chen H, Zhang J, Wu H, Koh K, Yin Y. Sensitive colorimetric assays for α-glucosidase activity and inhibitor screening based on unmodified gold nanoparticles. Anal Chim Acta 2015; 875:92-8. [PMID: 25937110 DOI: 10.1016/j.aca.2015.02.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 02/03/2015] [Accepted: 02/10/2015] [Indexed: 12/16/2022]
Abstract
A colorimetric sensor has been developed in this work to sensitively detect α-glucosidase activity and screen α-glucosidase inhibitors (AGIs) utilizing unmodified gold nanoparticles (AuNPs). The sensing strategy is based on triple-catalytic reaction triggered by α-glucosidase. In the presence of α-glucosidase, aggregation of AuNPs is prohibited due to the oxidation of cysteine to cystine in the system. However, with addition of AGIs, cysteine induced aggregation of AuNPs occurs. Thus, a new method for α-glucosidase activity detection and AGIs screening is developed by measuring the UV-vis absorption or visually distinguishing. A well linear relation is presented in a range of 0.0025-0.05 U mL(-1). The detection limit is found to be 0.001 U mL(-1) for α-glucosidase assay, which is one order of magnitude lower than other reports. The IC50 values of four kinds of inhibitors observed with this method are in accordance with other reports. The using of unmodified AuNPs in this work avoids the complicated and time-consuming modification procedure. This simple and efficient colorimetric method can also be extended to other enzymes assays.
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Affiliation(s)
- Hongxia Chen
- Laboratory of Biosensing Technology, School of Life Sciences, Shanghai University, Shanghai 200444, PR China
| | - Jiangjiang Zhang
- Laboratory of Biosensing Technology, School of Life Sciences, Shanghai University, Shanghai 200444, PR China
| | - Heng Wu
- Laboratory of Biosensing Technology, School of Life Sciences, Shanghai University, Shanghai 200444, PR China
| | - Kwangnak Koh
- Institute of General Education, Pusan National University, Pusan 609-735, Republic of Korea
| | - Yongmei Yin
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, PR China.
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59
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Li H, Fu HW, Zhao T, Kong DM. Simple, PCR-free telomerase activity detection using G-quadruplex–hemin DNAzyme. RSC Adv 2015. [DOI: 10.1039/c4ra14460k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A G-quadruplex DNAzyme-based telomerase activity detection method is developed by utilizing telomerase-triggered generation of short G-rich extension products.
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Affiliation(s)
- Hui Li
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Hai-Wei Fu
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Ting Zhao
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - De-Ming Kong
- State Key Laboratory of Medicinal Chemical Biology
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
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60
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Abstract
We provide an overview covering the existing challenges and latest developments in achieving high selectivity and sensitivity cancer-biomarker detection.
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Affiliation(s)
- Li Wu
- Laboratory of Chemical Biology and Division of Biological Inorganic Chemistry
- State Key laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
| | - Xiaogang Qu
- Laboratory of Chemical Biology and Division of Biological Inorganic Chemistry
- State Key laboratory of Rare Earth Resource Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
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61
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Zhu G, Yang K, Zhang CY. A single quantum dot-based biosensor for telomerase assay. Chem Commun (Camb) 2015; 51:6808-11. [DOI: 10.1039/c5cc01600b] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We develop a single quantum dot-based biosensor for the sensitive detection of telomerase in tumor cells and screening of anticancer drugs.
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Affiliation(s)
- Guichi Zhu
- Single-Molecule Detection and Imaging Laboratory
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
| | - Kun Yang
- Single-Molecule Detection and Imaging Laboratory
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
| | - Chun-yang Zhang
- Single-Molecule Detection and Imaging Laboratory
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
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62
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Zhu X, Xu H, Lin R, Yang G, Lin Z, Chen G. Sensitive and portable detection of telomerase activity in HeLa cells using the personal glucose meter. Chem Commun (Camb) 2014; 50:7897-9. [DOI: 10.1039/c4cc03553d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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